Flushing valve



1,443,690 R. M KEATING. V FLUSHING VALVE. FILED MAY 6, 1920.

Jan. 30, 1923..

2 SHEETSYSHEET I 11W (nun ATTORNEY being left between the inner wall of the stem and the outer wall of the sleeve for the passage of water to the retarding chamber 17. The upper end of the main valve stem is secured to a piston 21 that fits and is movable up and down in the cap section of the casing above the top or" the seat cage. The piston has apacking 22 which is held in place by a plate 23 secured to the upper side of the piston. A tube 24 that opens through the piston is fastened at one side of the center so as to extend downward from the piston. The lower end of this tube is closed and above the bottom the side wall of the tube is provided with a thin longitudinally extending slit 25. p

The starting valve seat 26 is located in the lower end of the main valve stem and is retained in place when the main valve is screwed upon the valve stem. The starting valve 27 is a cylindrical block of metal with a conical upper face and it fits within and is guided in its movements up and down b the walls of the ported hub 19 that extends down from the under side of the main valve. he starting valve is screwed upon the lower end of a spindle 28 and is secured in proper adjustment by a lock nut 29 before the main valve is screwed upon its stem. The starting valve spindle extends upward through the starting valve seat, main valve stem, packing gland, and into the sleeve that depends from the cap where it is attached to a plunger 30 which is providedabove the cap with an operating handle 31. Surrounding the starting valve spindle in the sleeve is a spring 32 arranged to thrust between the lower end of the sleeve and the bottom of the plunger for normally holding the starting valve tightly against its seat and through the starting valve holding the main valve against its seat.

A tube 33 extends loosely through the socket 11 in the cap and down into the slitted tube 24-, that projects downward from the piston. Near its upper end the tube 33 has a which rests upon the bottom of the socket for supporting the tube, and below the flange is a squared portion 35 that its the similarly shaped hole in the bottom of the socket to prevent the tube from rotating. The upper edge of the tubeis provided with notches 36, and turning into the upper end is a screw 37 with a'needle point that, depending upon the distance the screw is turned in, regulates the area of the open ng into the upper end of the tube. The s des of the screw are provided with longitudinal grooves 38. A plug 39 is screwed into the socket over the end of the tube and control valve screwa In assembling the structure the piston is first placed in the cap section with the cap tube extending into the piston tube. The handle with the lifting spring and starting valve spindle is then thrust through the cap sleeve, gland and main valve stem and the starting valve locked on the spindle in such position that the spring will hold it closed. The main valve seat cage is then inserted into the cap, after which the main valve is screwed upon its stem until it rests against the under side of the starting valve seat. The regulator cage is then screwed upon the seat cage and after the shutter has been adjusted soas to regu= late the area of the intake ports the body portion is placed over these parts and screwed onto the cap portion.

To operate the valve the handle is pushed down against the thrust of the spring. This first opens the starting valve and lets water under pressure on the intake side of the main valve up through the valve stem into the retarding chamber above the piston. Continued downward movement of the handle causes the lower side of the starting 3 v valve to engage the bottom of the hub pro:

jecting from the main valve and draw the main valve down away from its seat. Water from the intake ELSSIIIO through the re 'ub L O lator ports then flows through the main 7 valve seat and seat cage to the discharge opening. When pressure is removed from the handle the spring at once draws the starting valve tightly against its seat. This closes the passage up through the main valve stem to the retarding chamber. The upward thrust of the spring through thestarting valve and starting valve seat then causes the main valve to rise, but the main valve rises only as fast as the piston moves up and the piston can rise only as rapidly as it drives the water out of the retarding chamber through the ports in the socket in the cap,

cap tube, down through the grooves in the control screw and throughthe cap tube into through the notches in the upper end of the the piston tube, from which the water can only escape through the thin slit inits side. When the piston is way down this slit is fully open. As the piston rises the cap tube gradually closes the slit in the piston tube, so that while the control screw governs the speed at which the water can escape from the retarding chamber the speed is gradually checked as the piston nears the upper'end, of the chamber, by the restriction of the area of the slit through which the retarding water escapes. This provides for the required after flush and causes the main valv to close without water hammer.

The invention claimed is: 1. A flushing valve comprising a casing provided with intake and discharge openings and an internal flange, a regulator cage supported by said flange in the lower part of the casing, a seat cage secured to the regu lator cage, a main valve seat held between. said cages, a main valve movable in and guided B the walls at said regulator cage toward and from the main valve seat, a tu -l bular main valvesteih screwed into'th'e mats valve, a 'startingvalveseat secured the main valve by the tubular main valve stein; a ported hub dependingfr'oni the main valve, a starting valve movable in and guided by the walls of said ported hub toward and from the starting valve seat, a piston connected starting valve movable toward and from the starting valve seat, a handle connected with the starting valve, a spring for lifting the handle, a piston connected with the main valve, a ported tube carried by and extending downward from the piston, a tube supported by the top of the casing and extending downward through the piston and into the piston tube, and a valve screw turning in the upper end of the tube supported from the casing.

3. A flushing valve comprising a casing, a main valve seat, a main valve movable toward and from the main valve seat, a starting valve seat carried by the main valve, a starting valve movable toward and from the starting valve seat, a handle connected with the starting valve, a spring for lifting the handle, a piston connected with the main valve, a tube with a thin longitudinally extending slit carried by and extending downward from the piston, a tube supported by the top of the casing and extending downward through the piston and into the piston tube, and a valve screw turning in the upper end of the tube supported from the casing.

4. A flushing valve comprising a casing, a main valve seat, a main valve movable toward and from the main valve seat, a starting valve seat carried by the main valve, a starting valve movable toward and from the starting valve seat, a handle connected with the starting valve, a spring for lifting the handle, a piston connected with the main valve, a ported tube carried by and extending downward from the piston, a socket set in the top of the casing, a tube loosely supported by said socket and extending downward through the piston and into the piston tube, and a valve screw turning in the upper end of the tube supported from the cas- 5. A flushing valve comprising a casing, a main valve seat, a main valve movable toward and from the main valve seat, a starting valve seat carried by the main valve,- a

starting" valve movable toward and from the starting valveseat, a handle connected with has-taming valve, a spring for lifting the handle, a pistonconriected with the mainvalve, a-slittedtube carried by and eiiteii'ding downward from the piston, a tube supported by the top of tli'ecasing and extend ing valve seat carried by the main valve, a

starting valvemovable toward and from the starting valve seat, a handle connected with the starting valve, a spring for lifting. the handle, a piston connected with the main valve, a ported tube carried by and extending downward from the piston, a tube supported by thetop of the casing and extending downward through the pistonand into the piston tube, and a valve screw with lo-ngitudinal grooves inits side turning in the upper end of the tube supported from the casing.

7. A flushing valve comprising a casing, a main valve seat, a main valve movable toward and from the main valve seat, a starting valve seat carried by the main valve, a starting valve movable toward and from the starting valve seat, a handle connected with the starting valve, a spring for lifting the handle, a piston connected with the main valve, a ported tube carried by and eXtending downward from the piston, a removable socket set in the top of the casing, a tube with a flange resting on the bottom of said socket and extending downward through the piston and into'the piston tube, and a valve screw turning in the upper end of th tube supported from the casing. 1

8. A flushing valve comprising a casing, a

'main valve seat, a main valve movable toward and from the main valve seat, a starting'valve seat carried by the main valve, a starting valve movable toward and from the starting valve seat, a handle connected with the starting valve, a spring for lifting I the handle, a piston connected with the main valve, a ported tube carried by and extending downward from the piston, a removable ported socket setin the top of the casing, 'a tube loosely, supported by said socket and having a squared portion extending downward through a similarly, shaped hole in the socket and into the piston tube, and a valve screw turning in the upper end of the tube supported from the casing.

9. A flushing valve comprising a casing, a main valve seat, a main valve movable toward and from the main valve seat, a starting valve seat carried by the main valve,va

ing downward through the piston into the piston tube past the slot therein when the main valve is closed, a removable plug holding the casing tube in position, and a valve screw turning in the upper end of the tube supported from the casmg.

ROBERT M. KEATING. 

